No. No.
I'm not speaking about Fiat scam only, scamming and theft generally happen in both offline and online and yet there are still some scammers that are usually being apprehended offline, while some goes free too, same is happening online. Even with the KYC, some still go free. I am not saying KYC totally eradicate the whole problem.
If you read again, you will see that I said "KYC help to expose the information of " SOME" scammers. " Not all scammers!
Like OP was saying, if you go to a store or shop to buy something, why do they not ask for KYC? They don't right? But why do they have surveillance cameras all over the place? What does the surveillance cameras in those shops stand against? They might not capture your name, date of birth, home address but your face is there, which is still enough to track you down if you commit a crime in that place. Even if it take months or a year, they can still use your face to find you.